wow I think Allen could definitely be categorized as a star college player. He's also very athletic. I don't have his stats available but I'm pretty sure he averaged close to 20 pts last season. That gets you in "star" category in college. He also will most likely be a mid first rd pick in the draft soooo yeah.
If he's a mid 1st rounder it will be in 2018, he's staying all 4. When he didn't go last year I took that as a strong indication that he's not leaving early.